Apparatus for controlling scrapers



Feb. 3, 1931. MCLENNEN c. sLATE APPARATUS FOR CONTROLLING SCRAPERS Filed July 20. 1929 v ogn A o K l. y L, M

Patented Feb. 3, lgl

rrranf Fri-ica ASSG-NGR TO SLi-LTE CONSTRUCTON COLI- APPABATUS FCE- CGNTRQLLING SCRAPERS application filed muy 2e,

The object of my'invention is to provide Y novel apparatus for controlling the operation to said slot by the stop`19.

of a scraper and also for permitting of its control from a distance, as from the seat of a. tractor, by means of cords connected with the apparatus itself, and it is an object of my invention to provide novel means for adjusting the apparatus, and for mounting the operating lever, and :tor releasablyl locking same when operated.

l attain these and other objects of my invention by the apparatus illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of my Yinvention, with dotted line showing one ot the operative positions of lever l3; and

Figure Q is a top plan view of my invention.

kLilie numerals designate like parts in each of the several views.

Referring to the accompanying drawings, l provide a scoopor scraper body or box l, having a cutting blade 2, formed or mounted on its bottom plate member. l provide a tongue e, providedwith a slotted portion in which the slide 7 travels and to which slide is attached the three pulling rods 6, two ot which have their outer ends connecter .vitl'i the side of the scraper and the third, and middle, rod engaging a pin 9 which forms the aXis about which the scraper body turns.

At the rear of the body ot the scraper, l provide posts 14 extending to a point substantially above the body ot the scraper, and having apin 10 positioned some distance below the upper end of the posts and extending, through a slot 11 in the enlarged rear portion of the tongue land limited in movement rlhe upperends of postsll are providedwith a pin 15 which engages in a slot 2l in the ends of spaced parallel links 13. Each of these links 13 is made sectionsand is adj ustableas to length by means of suitable slots and bolts as illustrated in Fig. l. Theforward ends of the V linlrs 13 are pivotally connected by the pivot or bolt 16 to the operating lever 8, which is formed or made in-two sections in its lower end and pivetally mounted at 12 to the tongue -l or members aiixed to said tongue fl.'

YThe upper and free end ofthe levery 3 is Y' 22 on the levei` 1929. Serial No. 379,751.

provided with a rope 5 which runs under a suitable pulley and extends forward any desired distance, as for example, to the seat orl a tractor ahead, for operating the scraper.

l"v also provide a lever 23 pivotally mounted at llon the tongue land held in its normal substantially vertical position by spring. rlhis lever is provided with al lug 26 positioned to be engaged by a catch or projection 3 when the latter is pulled to its most forward position.

l. also provide a suitable pull cord 27, attached to the free end ot' lever 23 by which the latter may be operated to discngage it from operative connection with the catch 22 to release the lever 3 in accordance with the designs of the operator.

I prefer to provide shoes 20, as shown in Fig. 1 and Fig. 2, attached to the forward ends of the sides of the scraper. l provide a lever 1'? on the forward end ot the tongue 4t of the scraper, this lever 17 being' aranged to operate spring contr-ol catch 8 and disengage it from slide '7 to release the latter member. -A suitable pull cord 28 is attached to the free yend ot lever 1.7. l provide a suitable stop member 18 on the under side of tongue e spaced substantially distant from the end of the tongue, to limit the forward movement of tongue el and thus control or limit the range ot tilting or swinging movevment of the scraper. v

Particular attention is called to the eXtension ot posts 14 to a point substantially above the top ot the scraper, and above the of theoperating lever 3, which arrangementf makespossible the functioning of the operating lever in the manner illustrated Yand vdescribed. f

In operation, as slot 21 is not long enough to accommodate all of the forward movement-,of pin 15, the links 13, pin 16, and lever 3 will moveforward into the position shown in dotted lines in' Fig. 1, when lever 3 is operated. The lower part of lever 3, as shown in Fig. 2, smade of branching memeoY post at a point spaced a substantial distance above the connection of the draft device with the post, said linl Vhaving its forward end pivotally connected to said operating lever whereby when the lever is moved to a forward position it Will tilt the scraper. n

5. ln an apparatus ofthe class described, tl e combination with a scraper body, of a post at the rear thereof, said post extending a. substantial distance above the top of the scraper body7 a draft device having a slidable and pivotal connection with said post at a point spaced from the top portion thereof, a scraper operating lever mounted on the draft device, and a link pivotally and slidably con` nected to the upper end of the post at a point spaced a substantial distance above the connection of the draft device with tlie post, said link having` its forward end pivotally connected to said operating lever whereby when the lever is moved to a forward position it lWill tilt the scraper.

MGLENNEN C. SLATE. 

